Window washer&#39;s scaffold



Dec. 20, 1949 c. J. ROOS WINDOW WASHERS SCAFFOLD Filed Sept. 17, 1946 2Sheets-Sheet 2 vmcnkw 6'; 17.12am? Patented Dec. 20, 1949 UNITED STATESPATENT OFFICE 2,491,621 y WINDOW WASHERS SCAFFOLD Charles Johannes Roos,Muskegon, Mich. I Application September 17, 1946, Serial No. 697,547

This invention relates to scaffolds, and more I particularly to portablescaffolds of the type which may be readily rolled into position andextended through a window for use by window washers in washing thewindows.

An important object of the invention is to provide a scaffold which maybe extended through the window, the platform of the scaffold beingsupported exteriorly of the window so that the window washer may standthereon and wash the window with facility, without danger of the windowwasher falling.

A further object of the invention is to provide a scaffold which willprevent injury to persons due to falling bricks or other objects whilemaking repairs or during construction work.

Still another object of the invention is to provide a portable scaffoldhaving means to secure the scaifold against moving or becoming displacedwhile in use.

Another object of the invention is to provide a wheel-supported frameand a platform supported for vertical adjustment with respect to theframe, thereby adapting the scaffold for use in washing windows whichare various heights from the floor.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combinations of parts, hereinafter more fully describedand pointed out in the claims, it being understood that changes may bemade in the construction and arrangement of parts without departing fromthe spirit of the invention as claimed.

Referring to the drawings:

Figure 1 is a perspective view illustrating a portable scaffoldconstructed in accordance with the invention, as positioned within awindow, providing a platform for a window washer.

Figure 2 is a plan view thereof.

Figure 3 is a sectional view taken on line 3-3 of Figure 2.

Referring to the drawings in detail, the scatfold embodies a wheelsupported frame or truck 5, which is provided with handles 6 so that theframe or truck may be readily moved from place to place.

Disposed at the four corners of the frame or truck 5 and risingtherefrom, are threaded rods 1 that extend through the arms 8, the arms8 providing a support for the platform 9 which is provided withelongated openings Ill through which the securing bolts H extend, thebolts having wing nuts l2 thereon by means of which 3 Claims. (Cl.304-24) the platform 9 may be secured in position on the arms 8. l

Tubes l3 are fitted over the threaded rods 1, and are provided withthreaded openings in their lower ends to accommodate the threaded rods1, there/being provided arms l4 secured to the tubes 53, whereby thetubes may be rotated to adjust them longitudinally of the threaded rodsThreaded collars M are also mounted on the rods 1, directly under thearms 8, and are adapted to provide a support for the arms 8 to preventthe arms from moving downwardly. Arms it are formed on the threadedcollars l5 and afford means whereby the collars may be rotated andadjusted longitudinally of the threaded rods.

At the upper ends of the tubes i3, are spiders I! which have rings [8fitted over the upper ends of the tubes. The spiders are threaded. toreceive the threaded ends of the brace rods l9 that are of lengths toextend to the ceiling above the scaffold, the upper ends of the rods l9being formed with discs at that rest against the ceiling of the room inwhich the scaffold is positioned to prevent damage to the ceiling.

Mounted on the platform 9 are pivoted plates 2| that are substantiallytriangular in formation, and these plates are provided with arcuateshaped openings 22 that accommodate the bolts 23 rising from theplatform 8, the bolts 23 being provided with nuts 24 which may berotated through frictionally engaged plates 2| and hold them in theiradjusted positions. It will be seen that because of the construction ofthe plates, the plates 2| may be swung to various angular positions withrespect to the platform 9, to widen the guard which is supported by theplates, to enclose a window of a particular width.

The plates 2| provide a support for the guard which includes uprights25, cross bars 26 and an outwardly inclined guard frame 21 that extendsfrom the upper ends of the uprights 25.

As clearly shown by Figure 3 of the drawings, the uard frame is,provided with extensions that fit into the upper ends of the uprights25, and are secured in position by means of the thread screws 28.

Due to this construction it will be seen that the scafiold may bereadily dismantled to facilitate storage.

In the use of the device, the scaifold is adjusted for use, and theplatform end thereof is extended through the window to be washed, asshown by Figure l of the drawings.

The rods [9 are now positioned to engage the 3 ceiling of the room tohold the scafiold in a horizontal position against tilting under theweight of the person standing on the extended end of the platform.

The window washer can now have easy access to the window and will beguarded against falling from the window during the washing operation.

Having thus described the invention, what is claimed is:

1. A portable window washers scaffold, comprising a truck, threaded rodsarising from the four corners of the truck, arms mounted on the threadedrods, means on the rods and engaging the arms for moving the armsvertically with respect to the truck, a platform adjustably secured tothe arms and adapted to be extended through a window opening, supportinga erson washing a window, and means for securing the truck againstmovement.

2. A portable window washers scaffold, comprising a truck, a platformmounted for vertical adjustment with respect to the truck, said platiormbeing extended beyond one end or the truck, a, guard rail for theplatform, adjustable rods extending from the truck and adapted to extendto, the ceiling of the room in which the truck is positioned, exertingpressure against the ceiling and holding the truck against movement.

3. A portable window washers scaffold, comprising a truck, a platformincluding a pair of arms mounted for vertical adjustment with respect tothe truck, a platform plate secured to the arms, a pair of adjustabletriangular plates mounted on the platform, means for securing the platesagainst movement with respect to the platform, a guard rail mounted onthe plates and movable therewith, the guard rail surrounding theplatform, and adjustable means 'on the truck for engaging the ceiling ofthe room in which the truck is positioned for securing the truck againstmovement.

CHARLES JOHANNES ROOS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,362,944 Kirby Dec. 12,1,761,726 Havens June 3,1930 2,035,294- Black Mar. 2'4, 1936 2,106,002I-I'all Jan. =18, 1 938 2,248,794 Troche- July 8, 1941

